📖 Guides
Step-by-step answers to common problems. Every guide links to the tool you need.
How to Open iPhone HEIC Photos on Windows (and Convert Them to JPG)If iPhone photos won't open on your PC, the HEIC format is almost always the reason. Here is how to open or convert them.How to Reduce Photo File Size to Hit an Upload LimitWhen an upload says "file too large", here is how to hit the KB limit while keeping your photo sharp.How to Merge and Split PDFs: Turn Scattered Documents Into One FileHow to combine scattered PDFs into one file, or pull out just the pages you need.How to Reduce Video File Size to Fit Email and Upload LimitsWhen you see "file too large", here is how to bring a video down to the size you need.How to Extract Audio From a Video: MP4 to MP3When you only need the sound, here is how to turn an MP4 into an MP3.How to Make YouTube Subtitles: Auto-Generate an SRT, Upload It or Burn It InNo need to type every line. Let AI draft the subtitles, polish them, then upload.How to Transcribe Recordings to Text: Meetings, Interviews and LecturesLet AI do the typing and spend your time only on reviewing.How to Remove Backgrounds From Product Photos (and Make Them White)Remove the background from product shots in seconds and switch it to white — no Photoshop needed.How to Open RAR and 7Z Files Without Installing AnythingGot a RAR or 7Z you can't open? Extract it right in your browser — no software needed.Are Online File Converters Safe? How No-Upload Conversion WorksConverters that upload your files and converters that don't are completely different for privacy.New Monitor Checklist: 5 Things to Test (Dead Pixels, Backlight Bleed)Return windows are short. Here is what to check in ten minutes on the day it arrives.How to Stop Your Screen From Turning Off: Device Settings and a No-Settings OptionScreen keeps turning off? Here are the settings on every device, plus a way to keep it on when settings are locked.How to Use an Online Timer and Alarm Reliably (and Fix No Sound)A web timer with nothing to install — how not to miss the alarm, and how to use it day to day.How to Use the Pomodoro Technique: Make 25-Minute Focus a HabitStart with "just 25 minutes" and grow your daily focus time.How to Do a Tabata Workout: A 4-Minute Beginner Routine and Quiet Apartment MovesA high-intensity interval workout that's over in four minutes — routines you can do at home right now.Week Numbers Explained: ISO Weeks, Excel Formulas and Calendar SettingsMake sense of "W42" on a work schedule and why week numbers sometimes disagree.Korean Age Explained: How It Works and What Changed in 2023Why the same person can be 24, 25 or 26 in Korea — and which number is used today.